Move over Pam Anderson and Paris Hilton! The wrestler formerly known as Chyna is muscling her way into the hardcore sex tape market!

A promoter has gotten hold of an XXX-tape starring the buffed beauty and he is making the rounds in Hollywood trying to find a distributor. The home movie shows the grappler, whose real name is Joanie Laurer, cavorting in bed with ex-fiance, wrestler Sean Waltman, a.k.a. X-Pac.

"It's a pretty hot tape," a source tells The ENQUIRER. "It was shot in an L.A.-area apartment where Joanie and Sean lived earlier this year.

"They go through different sexual positions on her big bed. Occasionally, she's decked out in a tight black vinyl outfit with a flowing cape -- kinda like something 'Chyna' would wear in the wrestling ring!

'REALLY BIZARRE'

"There's even a segment where she puts on some leather gear and twirls swords that look straight out of 'Xena: Warrior Princess'!

"It's really bizarre!"

Joanie, 34, and Sean's romance has been pretty strange, too. They got engaged in 2002, but Joanie got a restraining order against Sean the following summer after she accused him of beating her up.

By the fall of 2003 they were back together, but soon split up after a fight in a California hotel.

'WE HAD FUN'

These days, Sean, 32, who has been in rehab for painkillers, is trying to make a wrestling comeback. Joanie, meanwhile, has been attempting to launch a music career with her band, The Chynna Dolls.

But the on-again, off-again couple still talk by phone.

Said the source, "They both laughed that the sex tape could only help their careers at this point, just like a sex tape helped Paris Hilton!

"Joanie said: 'Sean and I have been through a lot worse together. At least we had a lot of fun while making the tape!' " -- MICHAEL GLYNN